Johann Jakob Breitinger was a Swiss philologist and author.

Johann Jakob Brucker was a German historian of philosophy.

Johann Jakob Christian Donner was a German classical philologist and translator.

Johann Jakob Ebert was an 18th-century German mathematician, astronomer, poet and author.

Johann Jakob Engel was a German author.

Johann Jakob Griesbach was a German biblical textual critic. Griesbach's fame rests upon his work in New Testament criticism, in which he inaugurated a new epoch. His solution to the synoptic problem bears his name, but the Griesbach hypothesis has become, in modern times, known as the Two-Gospel hypothesis.

Johann Jakob Herzog, was a Swiss-German Protestant theologian.

Johann Jakob Hottinger was a Swiss historian. He was a great-grandson of philologist Johann Heinrich Hottinger (1620–1667).

Johann Jakob Merlo was a German historian, antiquarian and poet.

Johann Jakob Moser was a German jurist, publicist and researcher, whose work earned him the title "The Father of German Constitutional Law" and whose political commitment to the principles of Liberalism caused him to lose academic positions and spend years as a political prisoner.